JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2019
·Vol. 166
·期 15
·D882
·
IF 3.12
Da-Wei Yang,Ke-Ke Chang,Xiao-Fei Hu,Ya-Lan Liu,Tai-Qi Yin,Shi-Lin Jiang,Mei Li,Wei Han,Zhi-Fang Chai,Wei-Qun Shi
The objective of this work is to explore the electrochemical and electrodeposition behaviors of Eu (III) cation at the liquid binary Al-Ga alloy cathode. In addition, the co-reduction behaviors of Eu (III), Al (III) and Ga (III) were also systematically studied on a W electrode. The results indicated that Eu (III) can be reduced on the binary Al-Ga alloy cathode, and Eu (III), Al (III) and Ga (III) also can be co-reduced on the W electrode to form Al-Eu/Ga-Eu intermetallic compounds. At the same time, the isothermal section phase diagram of the Al-Ga-Eu ternary system at 773 K was also calculated. In addition, Al-Eu and Ga-Eu alloys were prepared by potentiostatic and galvanostatic electrolyses in the LiCl-KCl-EuCl3 melt. Finally, the electrodeposition products were characterized by X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM) coupled with Energy Dispersive Spectroscopy (EDS).
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Liyu Chen,Jiaxin Yang,Yifan Zhang,Shaohua Wu,Youjian Yang,Wenju Tao,Jiangyu Yu,Zhaowen Wang
The electrochemical behavior of Zr(IV) on a molybdenum (Mo) electrode in a KF-AlF 3 -Al 2 O 3 -ZrO 2 molten salt system was studied using cyclic voltammetry (CV), square-wave voltammetry (SWV) and chronopotentiometry (CP). The reduction process of Zr(IV) was found to follow a two-step, two-electron transfer mechanism: Zr(IV)+2e − →Zr(II) and Zr(II)+2e − →Zr(0). The reduction process was quasi-reversible and controlled by diffusion. Al-Zr alloys were successfully obtained on Mo and liquid aluminum electrodes by potentiostatic electrodeposition . Flower-like AlZr 3 and irregular granular Al 3 Zr were obtained on the Mo electrode, which were mainly attributed to the electrochemical co-reduction of Al(III) and Zr(IV) in the molten salt. Three Al-Zr alloy phases, Al 3 Zr , Al 3 Zr 2, and Al 2 Zr, were obtained on the liquid aluminum electrode, among which Al 3 Zr was dominant in the product, followed by Al 3 Zr 2 .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2020
·Vol. 26
·期 8
·3901-3909
·
IF 2.394
Li Mei,Sun Zhongxuan,Guo Dan,Han Wei,Sun Yang,Yang Xiaoguang,Zhang Milin
The electrode reaction of Pr(III) and coreduction of Pb(II) and Pr(III) were studied on an inert W electrode in eutectic LiCl-KCl to extract Pr from molten salt. The electrode process kinetic of Pr(III) on W electrode was firstly explored employing cyclic voltammetry (CV) and Tafel technique, such as the diffusion coefficient of Pr(III) in eutectic LiCl-KCl and the exchange current density ( j 0 ) for Pr(III)/Pr(0) couple and the electrode reaction activation energy. Then, various electrochemical techniques were used to investigate the coreduction of Pb(II) and Pr(III). Four cathode current peaks ascribed to the formation of Pr x Pb y intermetallic compounds were detected, which indicated that the Pr could deposit on pre-deposited Pb film, react with Pb, and form Pr x Pb y intermetallic compounds. Furthermore, the electrolytic products formed by galvanostatic electrolysis were characterized by scanning electron microscopy coupled with energy dispersive X-ray diffraction, which illustrated the formation of PrPb 3 intermetallic compound in LiCl-KCl-PbCl 2 -PrCl 3 melt.
研究领域:
化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2021
·Vol. 2021
·期 12
·1152-1159
·
IF 2.524
Quansen Wu,Gongguo Zhang,Yanyun Ma,Mengfan Li,Feng Liu,Hongwen Huang,Maochang Liu,Yiqun Zheng
Graphical Wavy gold-silver alloy nanowires with tunable diameters in the range of 2–10 nm are prepared via an ultrafast seed-mediated co-reduction. Their UV-vis extinction spectra show a broad absorbance band in the range of 450–550 nm. We report an ultrafast synthesis of wavy gold-silver (AuAg) nanowires with tunable diameters via a seed-mediated co-reduction. The success of current strategy relies on the use of an elevated reaction temperature to accelerate the synthesis to be completed within several minutes and the use of Au seeds with controlled sizes to enable the manipulation over their diameters in the range of 2–10 nm. The presence of chloride-contained quaternary ammonium surfactant and excessive reductant have been demonstrated to be critical for the high-yield formation of AuAg products with the unique morphology of wavy nanowire. Due to the advantage in size control, the size effect on the plasmonic behavior of AuAg alloy wavy nanowires is investigated, where the products with sub-5 nm diameter exhibit a broad shoulder absorbance peak in their spectrum.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 53
·30530-30538
·
IF 2.936
Wei Han,Wenjuan Wang,Yongchang Dong,Mei Li,Xiaoguang Yang,Milin Zhang
The electrode reaction of Pb(II) and co-reduction of Li(I) and Pb(II) were investigated on a tungsten electrode in LiCl–KCl eutectic melts by a range of electrochemical techniques. From cyclic voltammetry and square wave voltammetry measurements, the reduction of Pb(II) was found to be a one-step diffusion-controlled reversible process with the exchange of 2 electrons. The diffusion coefficients of Pb(II) were computed, and they obey the Arrhenius law. Using the linear polarization technique, the kinetic parameters, such as exchange current intensity (j0), standard rate constant (k0) and charge transfer resistance (Rct) for the Pb(II)/Pb(0) couple on a tungsten electrode were studied at different temperatures, and the activation energy is 27.32 kJ mol−1, smaller than the one for diffusion of Pb(II), which further confirmed that the reduction of Pb(II) was controlled by diffusion. A depolarisation effect for Li(I) reduction was observed from the results of cyclic voltammetry, square wave voltammetry and chronopotentiometry due to the formation of Li–Pb alloys by co-reduction of Li(I) and Pb(II). Furthermore, five Li–Pb intermetallic compounds, LiPb, Li8Pb3, Li3Pb, Li10Pb3 and Li17Pb4 characterized by scanning electronic microscopy and X-ray diffraction, were selectively prepared by potentiostatic electrolysis on a tungsten electrode and galvanostatic electrolysis on a liquid Pb electrode, respectively.
研究领域:
电化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2019
·
IF 3.218
Di Chen,Rong-Hua Zhang,QingYun Hu,Yi-Fei Guo,Shao-Na Chen,Xin-Wen Zhou,Zhong-Xu Dai
The high electrocatalytic activity of Cu@PdCo icosahedrons were synthesized via a facile, one-pot seed co-reduction method. Subsequent X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and high-resolution TEM (HRTEM) analysis reveal that as-synthesized Cu@Pd-1, Cu@Pd-2 and Cu@PdCo-1 catalysts have core-shell structure and the average particle size reached 18.84 nm, 16.34 nm and 16.88 nm, respectively. By compared with Cu@Pd-1, Cu@Pd-2 and commercial Pd black, icosahedron morphology, special core-shell structure, surface etching exposed Pd active sites can be used to explain the superior ethanol oxidation performance of as-synthesized Cu@PdCo-1 nanocatalysts. This method is expected to lead the preparation of more multielement icosahedral core-shell catalysts for more catalytic applications.
研究领域:
材料科学
·
电化学
·
催化
✓ 已验证
产品关联
DOI
高影响因子
ULTRASONICS SONOCHEMISTRY
·
2019
·
IF 7.279
L.L. Dong,Y.C. Ding,W.T. Huo,W. Zhang,J.W. Lu,L.H. Jin,Y.Q. Zhao,G.H. Wu,Y.S. Zhang
Recently, graphene decorated with various inorganic nanoparticles, such as Pt, Au, Ag, TiO 2 and Fe 3 O 4 , among which Ag nanocomposites are good candidates for electronics, optics, electrochemistry and catalysis. However, preparation techniques for Ag nanoparticles/carbon matrix hybrids require tedious multi-step processes often involving toxic reducing agents/high temperatures which is not viable for scalable production. Here, a facile, one step and eco-friendly chemical co-reduction route was utilized to synthesis of a new nanocomposites by Ag nanoparticle anchored on reduced graphene oxide (rGO) at ambient temperature and combined first principles theoretical analyze their interfacial adsorption behavior, is reported. In this way, graphene oxide (GO) and Ag + simultaneously reduced by thiourea dioxide (TD) without using any additional reduced reactants. Results indicated that GO was successfully reduced to rGO and well-dispersed Ag nanoparticles with sizes of 6–7 nm, anchored on the surface of rGO sheets. Reduction mechanism was attributed to the synergistic effect of its hydrolysis products in aqueous media. The experiment and theoretical calculation results obtained demonstrate this method to be applicable to the synthesis of other metals on rGO sheets in order to improve wettability and interfacial bonding between rGO and metal and may possibly find various forthcoming medicinal, industrial and technological applications.
研究领域:
材料科学
·
理论化学
✓ 已验证
DOI
PubMed
高影响因子
SENSORS
·
2015
·Vol. 15
·期 7
·16614-16631
·
IF 2.245
Zongya Zhao,Mingming Zhang,Xiang Chen,Youjun Li,Jue Wang
In this paper, AuPt bimetallic nanoparticles-graphene nanocomposites were obtained by electrochemical co-reduction of graphene oxide (GO), HAuCl4and H2PtCl6. The as-prepared AuPt bimetallic nanoparticles-graphene nanocomposites were characterized by scanning electron microscopy (SEM), electrochemical impedance spectroscopy (EIS) and other electrochemical methods. The morphology and composition of the nanocomposite could be easily controlled by adjusting the HAuCl4/H2PtCl6concentration ratio. The electrochemical experiments showed that when the concentration ratio of HAuCl4/H2PtCl6was 1:1, the obtained AuPt bimetallic nanoparticles-graphene nanocomposite (denoted as Au1Pt1NPs-GR) possessed the highest electrocatalytic activity toward dopamine (DA). As such, Au1Pt1NPs-GR nanocomposites were used to detect DA in the presence of ascorbic acid (AA) and uric acid (UA) using the differential pulse voltammetry (DPV) technique and on the modified electrode, there were three separate DPV oxidation peaks with the peak potential separations of 177 mV, 130 mV and 307 mV for DA and AA, DA and UA, AA and UA, respectively. The linear range of the constructed DA sensor was from 1.6 μM to 39.7 μM with a detection limit of 0.1 μM (S/N= 3). The obtained DA sensor with good stability, high reproducibility and excellent selectivity made it possible to detect DA in human urine samples.Keywords:AuPt bimetallic nanoparticles-graphene nanocomposite;electrochemical co-reduction;dopamine
研究领域:
分析化学
·
材料科学
·
生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF RARE EARTHS
·
2020
·
IF 3.104
Mei Li,Yongcheng Zhang,Haiming Li,Hailing Jiang,Wei Han,Yang Sun
In the present work, cyclic voltammetry (CV), square wave voltammetry (SWV) and chronopotentiometry (CP) were used to investigate the electrochemical coreduction behaviors of La(III) and Mg(II) as well as La(III), Mg(II) and Mn(II) on Mo electrode in LiCl + KCl molten salts. CV and SWV results exhibit that the coreduction mechanism of La (III) and Mg(II) on Mo electrode is that La(III) is reduced and Mg–La intermetallic compound is formed, leading to the deposition potential of La(III) shifting to more positive one. The electrochemical signals pertaining to the formation of metallic La, Mg and Mn as well as Mg–La intermetallic compound are also observed by coreduction of La(III), Mg(II), and Mn(II) in LiCl + KCl molten salt on the inert Mo electrode. However, the electrochemical signals associated with the formation of La–Mn and Mg–Mn alloys are not observed, which means that the depolarization effect of La(III) and Mg(II) does not occur on pre-deposited Mn electrode. The Mg–La–Mn alloys were formed by co-deposition of La(III), Mg(II), and Mn(II) on Mo electrode at various concentration ratios of La(III) and Mg(II). The results of scanning electron microscopy equipped with energy dispersive spectroscopy and X-ray diffraction displays that the Mg–La–Mn alloys are comprised of La–Mg compound Mg 17 La 2 , Mg and Mn phases. The concentration ratio of La(III) and Mn(II) has few effects on the alloy composition .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2012
·
IF 2.905
Xiao Xia Jiao,Hong Qun Luo,Nian Bing Li
A mixture of graphene oxide and tetrachloroauric acid were directly electrochemical co-reduced on a glassy carbon electrode (GCE) through cyclic voltammetry (CV). A graphene–gold nanocomposite film modified GCE was fabricated and used to investigate the electrochemical behavior of 4-nitrophenol by CV, electrochemical impedance spectroscopy, chronocoulometry and linear sweep voltammetry. Compared with the bare GCE and the gold nanoparticles modified GCE, it was found that the oxidation signal of 4-nitrophenol was remarkably improved at the graphene–gold nanocomposite film modified GCE. The experimental parameters such as the types of buffer solutions, the pH of supporting electrolyte, the amounts of deposits, the accumulation time and potential were optimized. Under the optimum experimental conditions, the oxidation peak currents were proportional to the 4-nitrophenol concentration in the range of 3.6 × 10 −8 –9.0 × 1 0 −5 M with a detection limit of 1.0 × 10 −8 M ( S / N = 3). The modified electrode which presented high sensitivity, good repeatability and stability was applied to the direct determination of 4-nitrophenol in river water samples.
研究领域:
分析化学
·
纳米材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2022
·
IF 4.632
Guoqing Yu,Lin Zhou,Fengqin Liu,Siming Pang,Dehong Chen,Hongliang Zhao,Zhengping Zuo
In this study, a molten salt co-reduction method was proposed for preparing Y–Al intermediate alloys and the electrochemical co-reduction behaviors of Y(III) and Al(III) and the reaction mechanism of intermetallic compound formation were investigated by transient electrochemical techniques . The results show that the reduction of Y(III) at the Mo electrode is a reversible electrochemical process with a single-step transfer of three electrons, which is controlled by the mass transfer rate. The diffusion coefficient of Y(III) in the fluoride salt at a temperature of 1323 K is 5.0238 × 10 −3 cm 2 /s. Moreover, the thermodynamic properties associated with the formation of Y–Al intermetallic compounds were estimated using a steady-state electrochemical method. Y–Al intermediate alloy containing 92 wt% yttrium was prepared by constant current electrolysis at 1323 K in the LiF–YF 3 –AlF 3 –Y 2 O 3 (6 wt%)–Al 2 O 3 (1 wt%) system at a cathodic current density of 8 A/cm 2 for 2 h. The Y–Al intermediate alloy is mainly composed of α-Y 2 Al and Y phases. The development and application of this innovative technology have solved major technical problems, such as a long production process, high energy consumption, and serious segregation of alloy elements at this stage.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2018
·Vol. 20
·期 14
·1978-1984
·
IF 3.304
Chang Liu,Li Li,Qianqian Su,Feng Wu,Jian Dong,Weiping Qian
In this study, a simple and mild route was designed for the synthesis of novel octahedral Ni-introduced CuAu nanocages via a co-reduction process. Based on sequential reactions, Cu2O/Au nano-octahedra were firstly prepared through galvanic displacement reaction by employing octahedral Cu2O as the template, and then nickel and copper were introduced almost simultaneously to form the Ni-introduced CuAu nanocages by using N2H4·H2O as the reducing agent and excess Cu2O as the copper source. The peroxidase-like activity of the Ni-introduced CuAu nanocages was tested and the relevant parameters of their enzymatic activity were also investigated systematically. Compared with monometallic Cu2O/Au nano-octahedra, Ni-introduced CuAu nanocages have superior catalytic activity, and such a magnetic catalyst could still keep a relatively high catalytic efficiency after several cycles. The results showed that the as-prepared magnetic multi-metallic nanocages could be used as an efficient recyclable peroxidase-like catalyst.
研究领域:
纳米材料科学
·
催化化学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）